So I noticed on the investor thread someone started to use CarFax to verify and check the vins. I discovered a free service that does similar (firstly, shows whether its a real vin or not), last reported odometer reading, Stolen, etc... Using this I think I've narrowed down the Check Digit pattern. With a few other minds, I think we might be able to track the latest registered VIN. Check Any VIN Free | Free VIN Check | Free VIN Decoder (There is a daily limit to searches, I wasn't counting but I think its around 10.) I discovered the following valid vins: 5YJ3E1EA9HF001134 5YJ3E1EA0HF001135 5YJ3E1EABHF001136 5YJ3E1EADHF001137 5YJ3E1EAFHF001138 My current theory is that the Check Digit (underlined) climbs sequencially 1-9,0,B,D,E,F...every other letter, recycle the list. Next valid VIN should be 5YJ3E1EAHHF001139

Nevermind...apparently this will show any VIN that meets the check digit requirements 5YJ3E1EA6HF999999 Disregard any hopes of tracking new vins

5YJ3E1EA9HF001134 is the highest VIN recognized by NHTSA and CarFax. Currently using: Alton's VIN Calculator Results to plug in ### VIN to get valid check digit, and then taking the good VIN to Recalls If Tesla hasn't registered the VIN yet, it states "An error occurred with your request. Tesla Motors, Inc. does not recognize your VIN."

I tried on this site as well, no luck (plus there's an annoying CAPCHA) VIN Recall Search | Tesla Service

Check digits are determined by calculation, where any alphanumeric value is assigned a number value. Numbers values remain as numbers. Then each position in the VIN is multiplied by weighted multiplier. Then these are added up and then divided by 11. The remainder is the check digit. Because of the calculation and sequential build numbers, there appears to be a pattern, but not positive it truly is a continuing consistent pattern. Would be easy to create a spreadsheet to calculate this. Here is explanation and calculation information: VINcalc

According to CJ Pony Parts, the check digit is calculated by removing all of the letters and substituting them with their appropriate number counterparts. You then take those numbers and multiply them against a weight factor table. You then have 16 numbers which you add together and then divide by 11. The remainder is the check digit. If the remainder is 10, then the check digit is “X”. I use this Check Digit Calculator to verify if the VIN is valid. And, if I already have a valid VIN with no issues, whatsoever, I can then run a Tesla VIN check to check to see if the car was stolen, wrecked, had any reported flood damage, issued a salvage-title, and whether there were any recalls on the vehicle.